Unit lock



Feb. 3, 1931. N. B. HURD 1,791,029

Filed Sept. 14, 1929 w mmfgfmmnmmv Patented Feb. 3, 1931 UNITED STATESPATENT OFFICE NORMAN B. HURID, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TOTHE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, ACORPORATION OF CONNECTICUT UNIT LOCK Application filed September 14,1929.

The main object of the invention is to pro 7 side in such a constructionmeans whereby o a mechanic skilled in the art from a reading of thefollowing description and an examination of the accompanying drawings,in which Fig. 1 is a plan view of my lock as it will ppear on a door, aportion of the door being shown in section;

Fig. 2 is a view similar to Fig. 1, showing the outside knob and itsmounting removed;

Fig. 3 is a front elevation of Fig. 1; and

Fig. 4 is a front elevation of those parts in Fig. 2 shown as remainingupon the door when the outer knob is removed.

I have shown and will now describe one preferred form of my invention,it being unlerstood that various changes and modificaions may be madewithout departing from the spirit of the invention or the scope of theappended claims.

10 represents that part of the unit lock mechanism which carries theusual bolt 15,

which, in the form shown, is of the latch type. This part of the lockmechanism stands in a suitable recess in the front edge of a door 13. 11is a face plate for the inner side of the door. This plate 11 hasmounted thereon the inside knob 14. 12 is a plate for the outside of thedoor, which I will term a clamping plate, which plate may be secured tothe plate 12 by a powerful screw 16. This screw is entered from theoutside of the plate 12, and the threaded end takes into threadedopening in the inside of the inner face plate 11.so that the finish andappearance of the inside plate will not be mutilated by an unneccssaryscrew hole. The screw 16 causes the Serial No. 392,634.

plates to clamp firmly on the opposite sides of said door, to hold thelock mechanism in operative position. If desired, additional screws 1717may be used to further hold the plate 12 to the door.

18 conventionally represents a hollow spindle connected with the insideknob 14 and passing through a hole 19 in the door and with which spindlethe bolt 15 may be connected by any means well known in the art, theparticular form of which means is immaterial to this invention. Byturning the knob 14 the bolt 15 may be retracted in the usual way. I

20 represents an outside door knob, which is hollow, to contain suitablekey-actuated mechanism 26, and said knob and key-actuated mechanism maybe connected with the lock mechanism by any suitable means well known inthe art, so that the latter may be operated either by the knob 20 or thekey actuated mechanism 26, or both.

21 is an outside face plate on which the outside knob 20 is mounted, sothat when the outside plate is applied to or removed J1 from the door itwill carry with it the said knob 20. 25 is the usual spindle, whichconstitutes one of the ordinary means employed for connecting theoutside lock actuating mechanism with said lock mechanism. The plate 21constitutes the outside finishing or escutcheon plate and may be of anyappropriate design and finish. This plate 21 is preferably constructedto completely hide the plate 12 when all the parts are assembled, sothat the design and finish of the plate 12 is immaterial so far asconcerns the appearance of the lock. The plate 21 is secured to the doorby means of powerful screws 24-24,

which pass through the lock from the inside of the door, the threadedends of said screws taking into threaded portions of the plate 21,whereby said plate 21 will be securely held in operative position andcannot be removed excepting access is first had to the inside of theroom protected by the lock.

From the foregoing it will be seen that the lock mechanism, minus theoutside knob and plate 21, may first be adjusted and applied I to thedoor in such a manner as to hold the parts fixedly in operativeposition, so that said parts need not be removed, excepting they needrepair or replacement. The outside knob and the key operating mechanismtherein are thereafter applied to the door, together with the plate 21,and if for any reason it is desired to change or repair the key actuatedmechanism Within the door knob, this can be easily and quickly done bysimply 1 detaching the plate 21, which is accomplished by backing offthe screws 24. This act does not in any manner change the adjustment orconnection of the remaining parts of the lock, which are securelymounted on the door.

I claim:

1. A unit lock, comprising lock mechanism including a bolt, an insideface plate, an outside clamping plate, means for positively connectingsaid plates to cause them to embrace opposite sides of a door, a lockoperating knob carried by the inside plate,

an outside face plate overstanding said clamping plate, means accessibleat the indoor side of the lock for securing said outside face 3 plate inoperative position, an outside lock operating knob carried by theoutside face plate, and key-actuated lock operating mechanism carried bysaid knob, said outside face plate, knob and key-actuated mechanism bengremovable from said other parts of the lock.

2. A unit lock, comprising lock mechanism including a bolt, an insideface plate, a boltoperating knob carried thereby, an outside clampingplate, means for positively connecting said plates to cause them toembrace opposite sides of a door, an outside face plate carrying a knob,in turn carrying key-actuated lock operating mechanism, and meansaccessible at the indoor side of the lock for securing said outside faceplate in operative position, said outside face plate and the partscarried thereby being removable from the other parts of the lock.

3. A unit lock, comprising lock mechanism including a bolt, an insideface plate carrying a bolt-operating knob, an inside clamping platesecured to the inside face plate by means accessible from the outdoorside of c the lock, to cause said plates to embrace opposite sides ofthe door, an outside face plate overstanding said clamping plate, saidoutside plate carrying a bolt-operating knob, with key-actuated lockoperating means carried Within said knob, with means accessible at theindoor side of the lock for securing said outside face plate inoperative position and for releasing said outside face plate to permitthe removal of said plate, together v with the knob and key-actuatedmechanism carried thereby.

NORMAN B. HUBD.

